Valve



Dec. 17, 1935. J 5 JONES 2,024,823

VALVE Filed May 6, 1951 A T TORNEY-S.

Patented Dec. 17, 1935 UNITED STATES PATENT- OFFICE Chapman Valve Manufacturing Company,

Indian Orchard, Mass., a corporation of Massachusetts Application May 6,1931, Serial N0. 535,352

4 Claims.

This invention relates to valves, and more particularly to the mechanismfor opening and closing the valve.

The principal object of the invention is the provision of positively andautomatically acting means actuated, by simple rotation of the actuatingmember, to slightly raise the valve from its seat prior to its rotationfrom closed to open position. Other and further objects will be apparentfrom the following specification and claims.

In the accompanying drawing which illustrates one embodiment of theinvention as applied to a plug cock type of valve:

Fig. 1 is a vertical section substantially on line of Fig. 2;

Fig. 2 is a section substantially on line 2-2 of Fig. 1, showing theparts in the position they occupy when the valve is closed and seated;

Fig. 3 is a similar view showing the parts in the position they occupywhen the valve has been raised from the seat but is still in closedposition; and

Fig. 4 is a similar valve is open.

Referring to the drawing, designates the valve casing which is providedwith a seat 2 to receive the plug 3 having the customary aperture 4adapted when the valve is in open position to register with the opening5 of the valve casing. The casing is provided with a cover 1 throughwhich the stem 9 of the valve extends, the stem passing through asuitable packing, not shown, the packing follower being indicated at ID.

A yoke |2is mounted on the cover and is held in place by the cover boltsThe valve stem 9 is provided intermediate its length with a pinion l4keyed or otherwise secured to the stem as at I5. The outer end of stem 9is threaded as indicated at l6 and engages in a nut rotatably supportedin yoke I2 and held in place by a threaded flange l9. Theouter end ofnut I1 is provided with an extension or hub 20, squared or otherwiseshaped to receive a wrench. The inner end of nut I7 takes the form of apinion 2|. Pinions l4 and 2| may be similar in shape both being view ofthe parts when the mutilated (as shown in Figs. 2, 3 and 4) to form a IPinions l4 and 2| opera- Geneva, type of device. tively engage a pinion25 rotatably mounted on a stub shaft 26 supported in yoke l2 and held inplace as by a set screw 21. Pinion 25 is'also mutilated and is providedwith a curved recess 28 forming a Geneva movement and lock.

The plug may be lubricated through the hub and stem in any suitable at30.

Referring to Figs. 1 and 2 with the valve plug in seated and closedposition, it will be seen that the smooth portion 30 of pinion 2| is inengage- 6 ment with the recess 28 of pinion 25, locking pinion 25 andthus holding pinion l4 against rotation, the latter pinion being readyto mesh with pinion 25. Rotation of pinion 2|, by means of a wrenchapplied to hub 20, in the direction 10 of the arrow to the positionshown in Fig. 3, draws the stem upwardly into the nut l1, thus raisingthe plug off the valve seat. The teeth of pinions 2| and H are now inalignment and upon further rotation of nut |1 pinion 2| meshes 16 withpinion 25, rotating the latter and thereby rotating the pinion l4 andstem 9 to turn plug 3 and open the valve. As shown in Fig. 4, the gearslook at the end of a quarter turn from the position of Fig. 3,preventing the plug from tum- 20 ing beyond open position, but aconventional lug stop may be used if desired.

In closing the valve, the action is merely reversed. Return of gears 2|and from the position of Fig. 4 to that of Fig. 3 rotates pinion M 25and stem 9 to return plug 3 to closed position but still raised from itsseat. Upon further reverse rotation of nut and its pinion 2|, the smoothportion of the latter enters recess 28, locking pinion 25 and holdingstem 9 against rotation. Since stem 9 is thus locked against rotarymovement, the return of nut l1 and pinion 2| to the position of Fig. 2expels stem 9 from the nut, seating it firmly in its seat.

While I have illustrated the invention as applied to aplug cock valve,it will be understood that it may be applied to any valve or similarmechanism where it is desired to first raise and then turn one of themating members.

It will be understood that various changes may be made in the form andarrangement of parts without departing from the scope of my invention.

What I claim is:

1. In a valve structure which includes a rotatable valve member having athreaded valve stem,

a rotatable nut engaging the threads of the valve stem, means to holdthe nut against axial movement, and an intermittent drive between thenut and the stem, said drive including a member rotatable with the nutand operative during a. portion of the rotation of the nut to hold thestem against rotation and means rotatable with the nut and operativeduring a different portion manner, as indicated of the rotation oi thenut to rotate the stem a predetermined amount.

2. In a valve structure which includes a. rotatable valve member havinga threaded valve stem, a rotatable nut engaging the threads of the valvestem, means to hold the nut against axial movement, a Geneva gear formedon the nut, a Geneva gear secured to the stem, and a Geneva pinionconnecting said gears.

3. In a valve structure which includes a rotatable valve member having athreaded valve stem, a rotatable nut engaging the threads of the valvestem, means to hold the nut against axial movement and a mutilated geartrain between the nut and the valve stem, the gears of said train beingprovided with intermeshing cylindrical and arouately recessed portionsand intermeshing gear portions whereby the valve stem and its valvemember are held against rotation during a por- 20 tion of the rotarymovement of the nut and are on said nut and provided with a cylindricalportion and a toothed portion, a pinion having an arcuate recess withinwhich said cylindrical portion is adapted to engage during aportion ofthe rotation of the nut to hold the pinion against rotation, a toothedportion on the pinion adapted to mesh with the toothed portion of saidgear to cause the pinion to be driven thereby during a different portionof the rotation of the nut, and a gear secured to the stem and meshingwith the inion.

JOHN E. JONES.

